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Dual-Pump Coherent Anti-Stokes Raman Scattering Temperature and CO2 Concentration MeasurementsMeasurements of temperature and CO2 concentration using dual-pump coherent anti-Stokes Raman scattering, (CARS) are described. The measurements were performed in laboratory flames,in a room-temperature gas cell, and on an engine test stand at the U.S. Air Force Research Laboratory, Wright-Patterson Air Force Base. A modeless dye laser, a single-mode Nd:YAG laser, and an unintensified back-illuminated charge-coupled device digital camera were used for these measurements. The CARS measurements were performed on a single-laser-shot basis. The standard deviations of the temperatures and CO2 mole fractions determined from single-shot dual-pump CARS spectra in steady laminar propane/air flames were approximately 2 and 10% of the mean values of approximately 2000 K and 0.10, respectively. The precision and accuracy of single-shot temperature measurements obtained from the nitrogen part of the dual-pump CARS system were investigated in detail in near-adiabatic hydrogen/air/CO2 flames. The precision of the CARS temperature measurements was found to be comparable to the best results reported in the literature for conventional two-laser, single-pump CARS. The application of dual-pump CARS for single-shot measurements in a swirl-stabilized combustor fueled with JP-8 was also demonstrated.
Document ID
20090026206
Acquisition Source
Langley Research Center
Document Type
Reprint (Version printed in journal)
Authors
Lucht, Robert P.
(Texas A&M Univ. College Station, TX, United States)
Velur-Natarajan, Viswanathan
(Texas A&M Univ. College Station, TX, United States)
Carter, Campbell D.
(Innovative Scientific Solutions, Inc. Dayton, OH, United States)
Grinstead, Keith D., Jr.
(Innovative Scientific Solutions, Inc. Dayton, OH, United States)
Gord, James R.
(Air Force Research Lab. Wright-Patterson AFB, OH, United States)
Danehy, Paul M.
(Australian National Univ. Canberra, Australia)
Fiechtner, G. J.
(Sandia National Labs. Livermore, CA, United States)
Farrow, Roger L.
(Sandia National Labs. Livermore, CA, United States)
Date Acquired
August 24, 2013
Publication Date
April 1, 2003
Publication Information
Publication: AIAA Journal
Publisher: American Inst. of Aeronautics and Astronautics
Volume: 41
Issue: 4
Subject Category
Aerodynamics
Funding Number(s)
OTHER: 922-20-08-71
CONTRACT_GRANT: F33615-99-C-2964
Distribution Limits
Public
Copyright
Public Use Permitted.
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